Trolley base



L. F. BURNHAM ET AL TROLLEY BASE Filed Oct. 10. 1925 3 Sheets-Sheet 1 WITNESS si ATTO-RNLEY l Oct. 16, 1928. 1,687,657 L. F. BURNHAM ET AL V TROLLEY BASE iled oct.1o. 1925 s sheets-Sheet 2 Oct. 16, 1928.

L. F. BURNHAM ET AL TROLLEY BASE Filed Oct. 10, 1925 3 Sheets-Sheet 3 H Sb A K G N nm m -1. ..-l y rl Ill Q w E mm m m f, uw .N\ NN E QN uw wg?? WM 51M bnd Car/ .Schafer I Patented Oct. 16,` 1928.

.l UNITED STAT-ESV IIELAND F. BURNHAM, or PITTSBURGH, PENNSYLVANIA;` LESTER AH. Kami-0F Les ANeifiLns,V CALIFORNIA; AND CARL soiIA'rIin;` on ALLIsoN PAR-x, PENN'syLvANIAg ASSIGNORS TO GI-IOUSE ELECTR PORATION OLE' `IEENNSYLVANIA.

Ie AND MANUNACTUR'ING COMPANY, Acon-` TROLIQEY BASE,f i f Applicatie anniInternerV 1o, 19,25. ,semaine `.eisiii y Our invention relates to trolley bases, more particularly to trolley basesy for i currentcollectors that are utilized on electric .rail- Way vehicles. n y l, l It is'among the objects of our invention `to provide a .trolley base of improved design which shall be of simple, compact and durable mechanical construction.

Another object of our invention is to provide a trolley base tor current collectors which shall be provided `with improved locking means for maintainingV the pole member in 4a horizontal position, and which shall embody abuiier for. absorbingy the shocks incident to the accidental removal of tlieicolvlector, Wheel from tlie trolley lineandv 'for cushioning the pole against sharp impacts when it is manipulated to a raised position. I

Another object of our invention is to provide simple means for. assembling the several cooperating parts of thebase and polenieinbers, whereby ready access to any of the parts subjected t0 excessive1 Wear is prot/ideal"` for the purposes of replacing ory repairing ,the saine. j Heretofore, variousforms of trolley bases have been kproposed which embody'the usual stationary base, a turret member, and a hinged pole biased by one orymo're servicesprings to maintain a predetermined .tensien of thecol lector Wheel against tlie trolley Wire.

Our present invention contemplates, a

trolley basestructure in' lWhich the several tcooperating parts are ofvimproved design the purpose of obviating the diljliculties encountered in the manufacture, assembly and` operation of prior types of trolleyba'ses',

" In the accompanying drawings,coiistitiit ing al part .hereof and which like reference characters designate like parts;

Fig. 1 is a plan View of a trolley base, with the service springs partiallyy brollll away, embodying tlieprinciples of our invention, j

Fig. 3 isaii enlarged View uet a trunjnion member for engaging the buiierspring incur invention,

3 as the baseshown in Fig. 1,- Y

Fig. ,4: is a plan view of modified forni of V"trolley base embodying the same principles of mechanism and having .the saine function Fig; 5v..is an enlarged detailjvileiv a double spring trunnioiifemployed in connece` tioiiwiththe buersprings, A

Fig. 6 is a view,`partiallyiin sectionk and partially vinside elevation, of the trolley base o flj Fig. 11', showing tllie` pole'raised the operating position, andv Fig.' 7y is a'. @fragmentary partially in section, ,koe't'vtlie trolley bas/eavitlntlie pole in the vertical position.y Y i 'L 'I Referring to Figs. 4land the structure therein illustrated,comprises a mounting bracket 1, Whicliisadapte'd to be fscrcured to the roof` of` a railway Vvehicle and to. receive,astationary base member or `foot 2 f that is secured `thereto byv akplurality ot clamping bolts 3.1"The ybase v2 ,encloses aver tically hollow turret post ,4, whichV vis `adapted tok receive a turjr'etrrofor swivelling. movement in a'horizontalplane;`V y' ""l A plurality f, ntfricton roller bearings .6y are disposed betweenthe turret pest Land the` `turret on Swive f v thA SWVQL llhi f A The upper portion .of

i tlilllietrfet t iS ftvflgefdy and jprevia'ed Lwith I a circular groove 7, which is in co-operative Y `valignment with a complementary grooved portionS ofthe turret lffortlie'purpose of yreceiving a pin Q'tlat islield cot-ter keys 10ft() `cause the members and "5 to interact,

thereby;preventing disengagement of the turiretfaudv its base.

pivoted tothe rearwardextending portion 13 fof the "swivel lturret 5Qbyja pin 14. `'lfhe bracket k11 is provided `vvit-li` va clamping meinber-,15, in'wliiclitlietrolley "pole 16 is disposed, being secured byapairof bolts 17.

The upper poit-ionof the polebracket 11 is provided Wit-li an arm or'erid bracket 18, liavingz horizontal openings 19therein for receiving liangerbolt-VSQ() for engaging :one

A pole bracket aforked portionhlQ l Y lend of a pair ot' service' springsQl, the other `i'efprovided at theirear end vof the swivel `memberlorturpet.

l polelbiacket'llf'for receiving alateli pin, Wlii'cl'ifils' biased a `.coil spriiig126fthat'is eiids et which pare" eyeletstliat Fig. 2 is avieW inside eleVlOll llGI'QO-f,

Qlocatedfiinna recess 27 provided in thelsivivel v i member @1p-,The topk surface of bracketill is providedvwich a par @rf meer@@and,

set ange portion, a swivelframe journalled and swivel frame; atrolley pole secured in flO said swivel frame in its operative relation to September, 1925.

by a plurality of vertically disposed rollersaid bracket, and a buffer provided in Saidv bearings in said supportJ a key secured in swivel frame to coact With said pole bracket. i' said swivel frame and adapted to engage the In testimony whereof, We have hereunto oli-set portion of said` support to maintain subscribed our names the 9th and 24th days of said support, a combined pole and spring LELAND BURNHAM. bracket pivotally mounted on said swivel LESTER HpKElM.

p frame, service springs connecting said bracket CARL SCHAFER. 

